A fast moving cold front ushered in very strong and damaging northwest winds across central, north central, and northeast South Dakota. Northwest winds of 30 to 50 mph with gusts over 60 mph began in the early morning and continued into the early evening. The high winds downed many trees and branches along with several power lines and poles. The high winds also damaged some roofs and signs and broke off many acres of unharvested corn. The highest measured wind gust was 73 mph just west of Onida in central South Dakota.